Top 100 Green Energy startups in USA
Apr 14, 2026
|
Like
30
1
Funding: $39.7M
Claros creates power management platform for data centers that utilizes cutting-edge hardware, software to enhance their energy efficiency and enable sustainable high-performance computing.
Claros creates power management platform for data centers that utilizes cutting-edge hardware, software to enhance their energy efficiency and enable sustainable high-performance computing.
2
Solatube develops system for bringing natural daylight into buildings. Its tubular daylighting device (TDD) is a compact and airtight alternative to traditional skylights, minimizing glare and solar heat gain. Solatube's tubular daylighting systems are modular and can be installed in hard-to-reach spaces and rooms, bypassing obstacles that skylights and windows simply cannot reach. They also provide ventilation and beautifully illuminate interiors, improve productivity and well-being, and reduce energy costs. Solatube provides a full range of consulting services for commercial properties, from design to installation, and is developing global distribution in over 100 countries. Acquired by Kingspan Light & Air USA
3
Funding: $150M
Arc Boats builds hybrid electric vessels: tugs, ferries, and electric motors for autonomous defense boats (ensuring stealth). Its integrated electric systems combine the propulsion system, energy storage, and software into a single, coherent platform. The electric motor delivers high instantaneous torque and flexible speed control for precise control in port, reducing downtime and lowering operating costs. They ensure efficient charging and more environmentally friendly operation for busy, repetitive schedules. Without fuel systems or complex transmissions, the electric propulsion system minimizes maintenance and downtime.
Arc Boats builds hybrid electric vessels: tugs, ferries, and electric motors for autonomous defense boats (ensuring stealth). Its integrated electric systems combine the propulsion system, energy storage, and software into a single, coherent platform. The electric motor delivers high instantaneous torque and flexible speed control for precise control in port, reducing downtime and lowering operating costs. They ensure efficient charging and more environmentally friendly operation for busy, repetitive schedules. Without fuel systems or complex transmissions, the electric propulsion system minimizes maintenance and downtime.
4
Funding: $12.3M
Nevoya is a transportation company using exclusively electric trucks. It purchases electric trucks and transports freight for Fortune 500 companies (seeking to lower carbon emissions) at prices comparable to those of similarly sized diesel trucks. Nevoya achieves this efficiency through the use of artificial intelligence. It uses AI to optimize trucking routes, selecting and balancing loads with suitable trucks for maximum efficiency while minimizing energy consumption. The company also uses AI to optimize charging schedules and battery management, as well as early fault detection, thereby reducing maintenance costs.
Nevoya is a transportation company using exclusively electric trucks. It purchases electric trucks and transports freight for Fortune 500 companies (seeking to lower carbon emissions) at prices comparable to those of similarly sized diesel trucks. Nevoya achieves this efficiency through the use of artificial intelligence. It uses AI to optimize trucking routes, selecting and balancing loads with suitable trucks for maximum efficiency while minimizing energy consumption. The company also uses AI to optimize charging schedules and battery management, as well as early fault detection, thereby reducing maintenance costs.
5
Funding: $80M
DG Matrix develops solid-state power conversion systems for electric vehicle charging and distributed energy applications. It also provides its Interport device to Exowatt, the company building solar-plus-storage containers to supply data centers with 24/7 electricity.
DG Matrix develops solid-state power conversion systems for electric vehicle charging and distributed energy applications. It also provides its Interport device to Exowatt, the company building solar-plus-storage containers to supply data centers with 24/7 electricity.
6
Funding: $42M
Chariot develops mobile energy solutions for military use. They provide autonomous power supply for drones, sensors, communication and control systems. According to the company, its products are already used by units of the US Army and the Defense Innovation Unit (DIU), as well as commercial customers.
Chariot develops mobile energy solutions for military use. They provide autonomous power supply for drones, sensors, communication and control systems. According to the company, its products are already used by units of the US Army and the Defense Innovation Unit (DIU), as well as commercial customers.
7
Funding: $10M
Mantis Space is energy provider for space missions and LEO satellites. It creates a constellation of spacecraft that orbit Earth, capturing solar energy and transmitting it to other spacecraft in orbit using optical systems with modern laser technology. These systems wirelessly transmit power directly to the satellites' existing solar panels. Mantis' power infrastructure eliminates the typical power shortage experienced by satellites when they enter darkness approximately every 95 minutes (a period known in the space industry as an eclipse) and extends their operational life.
Mantis Space is energy provider for space missions and LEO satellites. It creates a constellation of spacecraft that orbit Earth, capturing solar energy and transmitting it to other spacecraft in orbit using optical systems with modern laser technology. These systems wirelessly transmit power directly to the satellites' existing solar panels. Mantis' power infrastructure eliminates the typical power shortage experienced by satellites when they enter darkness approximately every 95 minutes (a period known in the space industry as an eclipse) and extends their operational life.
8
Funding: $4M
Arinna builds ultrathin solar panels specifically for spacecraft. Its technology is based on a new material - transition metal dichalcogenides that are atomically thin semiconductors. This technology allows for extremely flexible cells that the company claims are cheaper, more durable than legacy space solar panels and 32% more efficient. Arinna’s technology also won’t require protective coverings, will last 15 years on orbit, and can be delivered within weeks. The company expects to have its first products being tested on orbit before the end of 2026. After qualifying their photovoltaics in space, the company hopes to build a facility that can mass produce the stuff at megawatt scale in 2028.
Arinna builds ultrathin solar panels specifically for spacecraft. Its technology is based on a new material - transition metal dichalcogenides that are atomically thin semiconductors. This technology allows for extremely flexible cells that the company claims are cheaper, more durable than legacy space solar panels and 32% more efficient. Arinna’s technology also won’t require protective coverings, will last 15 years on orbit, and can be delivered within weeks. The company expects to have its first products being tested on orbit before the end of 2026. After qualifying their photovoltaics in space, the company hopes to build a facility that can mass produce the stuff at megawatt scale in 2028.
9
Funding: $4M
HomeBoost offers a do-it-yourself energy assessment system that helps homeowners identify leaky windows and find rebate opportunities and other ways to cut their energy bills. It ships to homeowners custom hardware that, coupled with a smartphone app, scans the home and then home energy experts review and produce the report.
HomeBoost offers a do-it-yourself energy assessment system that helps homeowners identify leaky windows and find rebate opportunities and other ways to cut their energy bills. It ships to homeowners custom hardware that, coupled with a smartphone app, scans the home and then home energy experts review and produce the report.
10
Funding: $532M
Lunar Energy manufactures battery storage systems and installs solar panels for homeowners in California, Georgia, and Washington. Lunar can use its fleet of batteries, available in 15- and 30-kilowatt-hour modules, to feed power into the grid as needed. Its virtual power plant (VPP) software can also manage electric vehicle chargers and appliances, allowing for simultaneous power supply and demand reduction. Lunar helps users save money - each day, the app creates a unique plan for maximum energy savings. The company monitors the weather, monitors power consumption spikes, such as when charging your electric vehicle and uses this data to develop this personalized daily plan. Lunar AI tracks rapidly changing energy prices, optimizing and automating home power system to reduce bills.
Lunar Energy manufactures battery storage systems and installs solar panels for homeowners in California, Georgia, and Washington. Lunar can use its fleet of batteries, available in 15- and 30-kilowatt-hour modules, to feed power into the grid as needed. Its virtual power plant (VPP) software can also manage electric vehicle chargers and appliances, allowing for simultaneous power supply and demand reduction. Lunar helps users save money - each day, the app creates a unique plan for maximum energy savings. The company monitors the weather, monitors power consumption spikes, such as when charging your electric vehicle and uses this data to develop this personalized daily plan. Lunar AI tracks rapidly changing energy prices, optimizing and automating home power system to reduce bills.
11
Funding: $387.7M
Workhorse is an electric truck manufacturing company that also offers aerial logistics solutions. The company produces several models of medium-duty electric vehicles with batteries of approximately 200 kWh and range of up to 150 miles on a single charge. These models include last-mile delivery van, shuttle bus with flexible seating for up to 14 passengers, school bus, box truck with various wheelbases and a payload capacity of up to 5,000 pounds and work truck with flatbed, flatbed or utility bodies and variety of configurations. The company also sells separate chassis which can be adapted to custom body types. Workhorse has teamed up with fellow electric truck manufacturer Motiv.
Workhorse is an electric truck manufacturing company that also offers aerial logistics solutions. The company produces several models of medium-duty electric vehicles with batteries of approximately 200 kWh and range of up to 150 miles on a single charge. These models include last-mile delivery van, shuttle bus with flexible seating for up to 14 passengers, school bus, box truck with various wheelbases and a payload capacity of up to 5,000 pounds and work truck with flatbed, flatbed or utility bodies and variety of configurations. The company also sells separate chassis which can be adapted to custom body types. Workhorse has teamed up with fellow electric truck manufacturer Motiv.
12
Funding: $362.7M
Harbinger manufactures medium-duty commercial electric trucks. Harbinger's scalable chassis is designed to accommodate the most popular medium-duty truck body styles on the road today. Its independent front suspension reduces front overhang and the tightly integrated battery, powertrain and frame provide ample floor height for easier loading and more usable space. Harbinger's specialized powertrain is designed for the harshest commercial trucking conditions and (as advertised) has a 450,000-mile lifespan. The battery packs are available in 35 kWh increments. The company builds fleets for utilities and large corporations and partners with industry leaders in charging infrastructure.
Harbinger manufactures medium-duty commercial electric trucks. Harbinger's scalable chassis is designed to accommodate the most popular medium-duty truck body styles on the road today. Its independent front suspension reduces front overhang and the tightly integrated battery, powertrain and frame provide ample floor height for easier loading and more usable space. Harbinger's specialized powertrain is designed for the harshest commercial trucking conditions and (as advertised) has a 450,000-mile lifespan. The battery packs are available in 35 kWh increments. The company builds fleets for utilities and large corporations and partners with industry leaders in charging infrastructure.
13
Funding: $178M
Heron Power develops industrial power electronics specifically designed for modern power systems. Its Heron Link products are integrated solutions based on solid-state transformers and SuperBBUs for powering AI data centers and hyperscale systems, solar power plants and energy storage. These modular systems provide AC-to-DC conversion, stabilizing pulsation and providing overload tolerance, eliminating the need for legacy equipment (low-voltage transformers, MSBs, UPSs, PDUs, RPPs, and power supplies). The result: smaller footprint, higher efficiency, scalable, rack-ready architectures and reduced total cost of ownership with superior uptime.
Heron Power develops industrial power electronics specifically designed for modern power systems. Its Heron Link products are integrated solutions based on solid-state transformers and SuperBBUs for powering AI data centers and hyperscale systems, solar power plants and energy storage. These modular systems provide AC-to-DC conversion, stabilizing pulsation and providing overload tolerance, eliminating the need for legacy equipment (low-voltage transformers, MSBs, UPSs, PDUs, RPPs, and power supplies). The result: smaller footprint, higher efficiency, scalable, rack-ready architectures and reduced total cost of ownership with superior uptime.
14
Funding: $156.6M
Verdagy enables the large-scale production of green hydrogen by innovating water electrolysis technology.
Verdagy enables the large-scale production of green hydrogen by innovating water electrolysis technology.
16
Funding: $17.1M
Addis Energy has developed a new technology for producing ammonia fuel for marine and industrial electricity generation. It first locates underground rocks rich in iron, then injects water, nitrogen and chemical catalyst into these rocks. This causes the oxygen in the water to bond with the iron in the rocks, forming rust and releasing hydrogen, which reacts with the nitrogen to form ammonia. The advantage of this process is that once the startup can implement this reaction on a large scale, ammonia production will be three times cheaper than the traditional process, which requires natural gas subjected to high temperatures and pressures. Besides, Addis' technology is clean, while the traditional ammonia production relies on a fossil fuel dependent chemical reaction called the Haber-Bosch process, which accounts for nearly 2% of carbon emissions annually.
Addis Energy has developed a new technology for producing ammonia fuel for marine and industrial electricity generation. It first locates underground rocks rich in iron, then injects water, nitrogen and chemical catalyst into these rocks. This causes the oxygen in the water to bond with the iron in the rocks, forming rust and releasing hydrogen, which reacts with the nitrogen to form ammonia. The advantage of this process is that once the startup can implement this reaction on a large scale, ammonia production will be three times cheaper than the traditional process, which requires natural gas subjected to high temperatures and pressures. Besides, Addis' technology is clean, while the traditional ammonia production relies on a fossil fuel dependent chemical reaction called the Haber-Bosch process, which accounts for nearly 2% of carbon emissions annually.
17
Funding: $2.5M
COI Energy runs a marketplace where enterprises can buy and sell excess energy capacity, as well as get better, predictive insights into their energy needs. By letting enterprise campuses share their reserved energy allotments with each other, the company instantly optimizes grid usage.
COI Energy runs a marketplace where enterprises can buy and sell excess energy capacity, as well as get better, predictive insights into their energy needs. By letting enterprise campuses share their reserved energy allotments with each other, the company instantly optimizes grid usage.
18
Funding: $4.9B
Redwood Materials is a leading battery and electronics recycling company. Founded by Tesla co-founder JB Straubel, the company's primary business is electric vehicle battery recycling. But in addition to car batteries, it recycles phones, laptops, tablets, power tools and any other lithium-ion-containing devices - to recover critical minerals such as lithium, nickel, cobalt, and copper. The company also uses old batteries to create own energy storage systems that supply electricity to data centers and the national power grid. The company also offers the creation of corporate and municipal energy storages. Thanks to using the most affordable domestic batteries, combining used and new batteries and simplifying installation and system design, it offers the most cost-effective energy storage systems on the market.
Redwood Materials is a leading battery and electronics recycling company. Founded by Tesla co-founder JB Straubel, the company's primary business is electric vehicle battery recycling. But in addition to car batteries, it recycles phones, laptops, tablets, power tools and any other lithium-ion-containing devices - to recover critical minerals such as lithium, nickel, cobalt, and copper. The company also uses old batteries to create own energy storage systems that supply electricity to data centers and the national power grid. The company also offers the creation of corporate and municipal energy storages. Thanks to using the most affordable domestic batteries, combining used and new batteries and simplifying installation and system design, it offers the most cost-effective energy storage systems on the market.
19
Funding: $4.9B
Recurrent Energy, a subsidiary of Canadian Solar Inc. (global renewable energy company) that is building one of the world's largest and most geographically diversified platforms for developing, owning and operating solar and energy storage projects. It is a leading global developer, owner and operator of solar and energy storage systems, with over 14 GW of project capacity under long-term operation and maintenance agreements.
Recurrent Energy, a subsidiary of Canadian Solar Inc. (global renewable energy company) that is building one of the world's largest and most geographically diversified platforms for developing, owning and operating solar and energy storage projects. It is a leading global developer, owner and operator of solar and energy storage systems, with over 14 GW of project capacity under long-term operation and maintenance agreements.
20
Funding: $4.8B
Bloom Energy creates fuel-cell systems for local power generation that can utilize a wide range of resources to generate electricity. Bloom Energy Server can use natural gas, biogas and hydrogen as fuel without combustion and is scalable to tens of megawatts. Installation and commissioning of the server can be completed in as little as three months. These servers are often used to power enterprise buildings and data centers. The company has developed proprietary solid oxide fuel cell technology that ensures low CO2 emissions. Bloom Energy also has its own hydrogen production facility at the world's largest solid oxide electrolyzer plant at NASA's Ames Research Center in Mountain View. The company syas, that this high-temperature plant produces 20-25% more hydrogen per MW than commercially demonstrated low-temperature electrolyzers.
Bloom Energy creates fuel-cell systems for local power generation that can utilize a wide range of resources to generate electricity. Bloom Energy Server can use natural gas, biogas and hydrogen as fuel without combustion and is scalable to tens of megawatts. Installation and commissioning of the server can be completed in as little as three months. These servers are often used to power enterprise buildings and data centers. The company has developed proprietary solid oxide fuel cell technology that ensures low CO2 emissions. Bloom Energy also has its own hydrogen production facility at the world's largest solid oxide electrolyzer plant at NASA's Ames Research Center in Mountain View. The company syas, that this high-temperature plant produces 20-25% more hydrogen per MW than commercially demonstrated low-temperature electrolyzers.
21
Funding: $3.9B
Crusoe Energy pioneered bitcoin (BTC) mining by using wasted natural gas as a power source
Crusoe Energy pioneered bitcoin (BTC) mining by using wasted natural gas as a power source
22
Funding: $3.5B
Archer is an aerospace company that developed an electric vertical takeoff and landing aircraft tailored for urban air mobility systems.
Archer is an aerospace company that developed an electric vertical takeoff and landing aircraft tailored for urban air mobility systems.
23
Funding: $3.2B
Sunnova provides low-cost solar power to homes. It owns the equipment, installs it, and also eventually sells the electricity it creates to customers.
Sunnova provides low-cost solar power to homes. It owns the equipment, installs it, and also eventually sells the electricity it creates to customers.
24
Funding: $2.9B
Commonwealth Fusion Systems is collaborating with MIT to create SPARC - the world's first fusion device that produces plasma that generates more energy than consumes. This compact, high-field tokamak will be built using high-temperature superconducting (HTS) magnets. CFS technology uses the new superconductor Rare Earth Barium Copper Oxide (REBCO) to produce the most powerful and most compact fusion magnets. Once SPARC is built, the company plans to build the world's first fusion power plant capable of generating hundreds of megawatts of power. CFS research is funded by the U.S. Department of Energy.
Commonwealth Fusion Systems is collaborating with MIT to create SPARC - the world's first fusion device that produces plasma that generates more energy than consumes. This compact, high-field tokamak will be built using high-temperature superconducting (HTS) magnets. CFS technology uses the new superconductor Rare Earth Barium Copper Oxide (REBCO) to produce the most powerful and most compact fusion magnets. Once SPARC is built, the company plans to build the world's first fusion power plant capable of generating hundreds of megawatts of power. CFS research is funded by the U.S. Department of Energy.
25
Funding: $2.9B
Eos produces zinc-based battery energy storage systems. The company's technology overcomes the limitations of traditional lithium-ion batteries paovides discharge time from 3 to 12 hours. The Eos Z3 zinc-based wet battery module includes zinc cathode, aqueous electrolyte, bipolar electrodes and polymer housing. The electrodes offer high mechanical strength, corrosion resistance and chemical stability, ensuring years of operation with virtually no degradation. Furthermore, the bipolar structure simplifies the battery's internal connections, reducing internal resistance and increasing energy conversion efficiency. The company is also developing a software platform for managing the energy storage system, which implements real-time intelligence, advanced control capabilities and AI-based analytics.
Eos produces zinc-based battery energy storage systems. The company's technology overcomes the limitations of traditional lithium-ion batteries paovides discharge time from 3 to 12 hours. The Eos Z3 zinc-based wet battery module includes zinc cathode, aqueous electrolyte, bipolar electrodes and polymer housing. The electrodes offer high mechanical strength, corrosion resistance and chemical stability, ensuring years of operation with virtually no degradation. Furthermore, the bipolar structure simplifies the battery's internal connections, reducing internal resistance and increasing energy conversion efficiency. The company is also developing a software platform for managing the energy storage system, which implements real-time intelligence, advanced control capabilities and AI-based analytics.
26
Funding: $2.4B
Nexamp is bringing clean energy to homeowners and communities everywhere, and helping them save up to 10% on electricity costs without installing rooftop solar panels.
Nexamp is bringing clean energy to homeowners and communities everywhere, and helping them save up to 10% on electricity costs without installing rooftop solar panels.
28
Funding: $2.1B
Silicon Ranch developer, owner and operator of solar energy facilities in US.
Silicon Ranch developer, owner and operator of solar energy facilities in US.
29
Funding: $2B
Pine Gate Renewables is a U.S. developer of 2-25 MW utility-scale solar farms.
Pine Gate Renewables is a U.S. developer of 2-25 MW utility-scale solar farms.
30
Funding: $1.8B
energyRe is at the forefront of North America's energy transition. Building and delivering reliable clean power directly to where people live is not only our opportunity—it is our responsibility.
energyRe is at the forefront of North America's energy transition. Building and delivering reliable clean power directly to where people live is not only our opportunity—it is our responsibility.
31
Funding: $1.8B
Beta Technologies manufactures electric vertical takeoff, landing eVTOL aircraft, and recharging pad systems.
Beta Technologies manufactures electric vertical takeoff, landing eVTOL aircraft, and recharging pad systems.
32
Funding: $1.8B
EVgo is one of the largest and most advanced electric vehicle fast charging networks in the US, offering over 1,100 industrial-strength fast charging stations. EVgo chargers are compatible with all fast-charging-capable electric vehicles. The company serves electric vehicle drivers, business owners, automakers, self-driving car companies and rideshare drivers. EVgo offers a user-friendly app for drivers, allowing to search for nearby charging stations, track charging sessions, view session summary and ensure safe charging with Autocharge+. Businesses can host an EV fast charging station for their customers. EVgo manages the entire process, from permitting and installation to maintenance and advanced customer service. Turnkey fast charging is available with no upfront or maintenance costs. Acquired by LS Power
EVgo is one of the largest and most advanced electric vehicle fast charging networks in the US, offering over 1,100 industrial-strength fast charging stations. EVgo chargers are compatible with all fast-charging-capable electric vehicles. The company serves electric vehicle drivers, business owners, automakers, self-driving car companies and rideshare drivers. EVgo offers a user-friendly app for drivers, allowing to search for nearby charging stations, track charging sessions, view session summary and ensure safe charging with Autocharge+. Businesses can host an EV fast charging station for their customers. EVgo manages the entire process, from permitting and installation to maintenance and advanced customer service. Turnkey fast charging is available with no upfront or maintenance costs. Acquired by LS Power
33
Funding: $1.7B
Redaptive is an Energy-as-a-Service provider that funds and installs energy-saving and energy-generating equipment and manages energy use in buildings.
Redaptive is an Energy-as-a-Service provider that funds and installs energy-saving and energy-generating equipment and manages energy use in buildings.
34
Funding: $1.7B
X-energy produces the Xe-100 - small modular nuclear reactor. It is a fourth-generation, 80-megawatt high-temperature gas-cooled reactor (HTGR), boasting high stability, efficiency, reliability and safety. The reactor can be scaled into 4-pack power plant thanks to its modular design. Its construction maximizes the use of off-the-shelf components, that can be delivered to the site using existing road and rail routes. The reactor does not rely on any active systems, electrical power or human intervention for safety, i.e. it shuts down and dissipates heat passively (as a result of the low power density). X-energy also produces TRISO-X fuel, which can withstand extreme temperatures. X-energy also aims to produce power systems for lunar bases.
X-energy produces the Xe-100 - small modular nuclear reactor. It is a fourth-generation, 80-megawatt high-temperature gas-cooled reactor (HTGR), boasting high stability, efficiency, reliability and safety. The reactor can be scaled into 4-pack power plant thanks to its modular design. Its construction maximizes the use of off-the-shelf components, that can be delivered to the site using existing road and rail routes. The reactor does not rely on any active systems, electrical power or human intervention for safety, i.e. it shuts down and dissipates heat passively (as a result of the low power density). X-energy also produces TRISO-X fuel, which can withstand extreme temperatures. X-energy also aims to produce power systems for lunar bases.
35
Funding: $1.6B
Bright Night provides renewable power solutions in a safe and reliable way.
Bright Night provides renewable power solutions in a safe and reliable way.
36
Funding: $1.6B
Form Energy develops and manufactures multi-day energy storage systems based on iron-air batteries. These batteries are capable cost-effectively store energy for 100 consecutive hours (unlike lithium-ion batteries, which can only provide energy for a few hours). The batteries are made from safe, inexpensive and abundant materials: iron, water and air. Form Energy operates its own large-scale battery manufacturing facility in West Virginia. The company also develops software for modeling renewable energy systems that take into account modern energy market.
Form Energy develops and manufactures multi-day energy storage systems based on iron-air batteries. These batteries are capable cost-effectively store energy for 100 consecutive hours (unlike lithium-ion batteries, which can only provide energy for a few hours). The batteries are made from safe, inexpensive and abundant materials: iron, water and air. Form Energy operates its own large-scale battery manufacturing facility in West Virginia. The company also develops software for modeling renewable energy systems that take into account modern energy market.
37
Funding: $1.5B
TerraPower is developing compact modular nuclear reactors with a closed fuel cycle. Its goal is to make nuclear energy safer and cheaper, while also minimizing radioactive waste. It was co-founded by Bill Gates and partners with GE Hitachi Nuclear Energy. Its sodium-cooled fast reactor, Natrium has capacity up to 345 MW, has a molten salt heat storage system and uses innovative liquid metal cooling. Its advantage is its flexible power output, allowing it to respond to fluctuating demand when combined with renewable energy sources. It uses liquid sodium as a coolant and highly enriched uranium (HALEU) as fuel (although the company is experiencing supply issues). The demonstration reactor project is expected to be operational by 2030.
TerraPower is developing compact modular nuclear reactors with a closed fuel cycle. Its goal is to make nuclear energy safer and cheaper, while also minimizing radioactive waste. It was co-founded by Bill Gates and partners with GE Hitachi Nuclear Energy. Its sodium-cooled fast reactor, Natrium has capacity up to 345 MW, has a molten salt heat storage system and uses innovative liquid metal cooling. Its advantage is its flexible power output, allowing it to respond to fluctuating demand when combined with renewable energy sources. It uses liquid sodium as a coolant and highly enriched uranium (HALEU) as fuel (although the company is experiencing supply issues). The demonstration reactor project is expected to be operational by 2030.
38
Funding: $1.5B
Qcells is a utility-scale solar developer, energy storage developer, and solar EPC provider.
Qcells is a utility-scale solar developer, energy storage developer, and solar EPC provider.
39
Funding: $1.5B
QuantumScape is a renewable energy company that develops solid-state battery technology to increase the range of electric cars.
QuantumScape is a renewable energy company that develops solid-state battery technology to increase the range of electric cars.
40
Funding: $1.5B
TAE Technologies is on a course to commercial fusion energy. It's fusion machine design is compact and linear so a commercial fusion power plant would be easily expandable for mass manufacturing. TAE is pursuing fusion with hydrogen-boron (a.k.a. p-B11 or p11B) because it is plentiful and radiation-free, making it the most sustainable option for running and maintaining commercial fusion power plants. TAE’s method to generate fusion power is called Advanced beam-driven Field-Reversed Configuration (FRC). All together, TAE’s approach to fusion can deliver a affordable product that has high energy density, high availability of fuel and no risk of pollution, proliferation, breakdown or toxic waste, making it the ultimate clean energy source.
TAE Technologies is on a course to commercial fusion energy. It's fusion machine design is compact and linear so a commercial fusion power plant would be easily expandable for mass manufacturing. TAE is pursuing fusion with hydrogen-boron (a.k.a. p-B11 or p11B) because it is plentiful and radiation-free, making it the most sustainable option for running and maintaining commercial fusion power plants. TAE’s method to generate fusion power is called Advanced beam-driven Field-Reversed Configuration (FRC). All together, TAE’s approach to fusion can deliver a affordable product that has high energy density, high availability of fuel and no risk of pollution, proliferation, breakdown or toxic waste, making it the ultimate clean energy source.
41
Funding: $1.5B
Fervo Energy is developing proprietary technology for developing and operating geothermal assets. Like its main competitors, Fervo uses hydraulic fracturing and directional drilling techniques borrowed from the oil and gas industry. However, Fervo can drill faster and deeper than existing geothermal developers to exploit hotter rocks and generate more energy at a lower cost. The startup is completing construction of its first large-scale power plant and has begun developing several other sites in the western US, where hot rocks are closer to the surface. Among its key investors is Google, which views geothermal energy as a potential solution for its data centers.
Fervo Energy is developing proprietary technology for developing and operating geothermal assets. Like its main competitors, Fervo uses hydraulic fracturing and directional drilling techniques borrowed from the oil and gas industry. However, Fervo can drill faster and deeper than existing geothermal developers to exploit hotter rocks and generate more energy at a lower cost. The startup is completing construction of its first large-scale power plant and has begun developing several other sites in the western US, where hot rocks are closer to the surface. Among its key investors is Google, which views geothermal energy as a potential solution for its data centers.
42
Funding: $1.4B
Sila Nanotechnologies is a provider and manufacturer of revolutionary car batteries.
Sila Nanotechnologies is a provider and manufacturer of revolutionary car batteries.
43
Funding: $1.2B
TeraWatt Infrastructure operates an electric vehicle charging infrastructure for medium and heavy-duty transport and fleets.
TeraWatt Infrastructure operates an electric vehicle charging infrastructure for medium and heavy-duty transport and fleets.
45
Funding: $1.2B
Base Power is a modern power firm for the electric era that has built a reliable and affordable residential energy service.
Base Power is a modern power firm for the electric era that has built a reliable and affordable residential energy service.
46
Funding: $1.2B
Group14 Technologies produces silicon-carbon composite materials for lithium-ion batteries (an alternative to graphite). Its flagship silicon battery material, SCC55, allows batteries to charge in minutes, withstand extreme charge-discharge cycles and last up to 50% longer than traditional lithium-ion batteries. It is used in smartphones, electric vehicle batteries and vertical takeoff and landing aircraft. The company has factories in South Korea, Germany and the United States and manages a global battery supply chain.
Group14 Technologies produces silicon-carbon composite materials for lithium-ion batteries (an alternative to graphite). Its flagship silicon battery material, SCC55, allows batteries to charge in minutes, withstand extreme charge-discharge cycles and last up to 50% longer than traditional lithium-ion batteries. It is used in smartphones, electric vehicle batteries and vertical takeoff and landing aircraft. The company has factories in South Korea, Germany and the United States and manages a global battery supply chain.
47
Funding: $1.2B
Nextracker creates smart solartracker solutions that improve the performance of solar PV plants.
Nextracker creates smart solartracker solutions that improve the performance of solar PV plants.
48
Funding: $1.1B
Infinium offers an electrofuels solution to decarbonize the transportation sector using today’s infrastructure.
Infinium offers an electrofuels solution to decarbonize the transportation sector using today’s infrastructure.
49
Funding: $1.1B
Longroad Energy builds and acquires wind and solar power plants in USA. The company operates over 75 large-scale projects of approximately 25 GW, including remote monitoring, asset management, on-site technical support and full back-office support. Its real estate and development experts acquire leases, options, easements, mineral rights and title insurance necessary for the construction and operation of solar, wind, and energy storage farms.
Longroad Energy builds and acquires wind and solar power plants in USA. The company operates over 75 large-scale projects of approximately 25 GW, including remote monitoring, asset management, on-site technical support and full back-office support. Its real estate and development experts acquire leases, options, easements, mineral rights and title insurance necessary for the construction and operation of solar, wind, and energy storage farms.
50
Funding: $1B
Helion Energy uses fusion energy to provide pure, safe electricity. Helion's fusion generator elevates fusion (Deuterium and helium-3) fuel to ultra-high temperatures to achieve plasma conditions and directly obtains electricity with a high-efficiency pulsed approach. Magnets confine the plasma in a Field Reversed Configuration (FRC) and speed up two FRCs to 1 million mph from opposite ends of the generator. When the FRCs collide in the center of the system, they are further compressed by a strong magnetic field until they reach fusion temperatures greater than 100M degrees Celsius (150M already achieved). At this temperature, the deuterium and helium-3 ions are moving fast enough to surpass the forces that would otherwise keep them apart, and they fuse. This emits more energy than is consumed by the fusion process. As new fusion energy is generated, the plasma enlarges.
Helion Energy uses fusion energy to provide pure, safe electricity. Helion's fusion generator elevates fusion (Deuterium and helium-3) fuel to ultra-high temperatures to achieve plasma conditions and directly obtains electricity with a high-efficiency pulsed approach. Magnets confine the plasma in a Field Reversed Configuration (FRC) and speed up two FRCs to 1 million mph from opposite ends of the generator. When the FRCs collide in the center of the system, they are further compressed by a strong magnetic field until they reach fusion temperatures greater than 100M degrees Celsius (150M already achieved). At this temperature, the deuterium and helium-3 ions are moving fast enough to surpass the forces that would otherwise keep them apart, and they fuse. This emits more energy than is consumed by the fusion process. As new fusion energy is generated, the plasma enlarges.
